Portable telephone



FIG. 1 is a perspective view of our new design for a portable telephone;

FIG. 2 is a right side perspective view of our new design when closed;

FIG. 3 is a front elevation view of our new design when open;

FIG. 4 is a rear elevation view of our new design when open;

FIG. 5 is a top plan view of our new design when open;

FIG. 6 is a bottom plan view of our new design when open;

FIG. 7 is a left side view of our new design when open;

FIG. 8 is a right side view of our new design when open;

FIG. 9 is a top plan view of our new design when closed;

FIG. 10 is a front view of our new design when closed; and,

FIG. 11 is a left side view of our new design when closed.

The ornamental design for a portable telephone, as shown and described. 